Seattle police are investigating anti-Semitic graffiti on the wall of a local Jewish temple that denied the Holocaust — the latest incident in a series of threats and harassment targeting the Jewish community nationwide in recent weeks.

The graffiti, which read "Holocaust is fake history!", was discovered Friday morning by an off-duty officer on the facade of the Temple De Hirsch Sinai, police said in a statement. (A dollar sign appeared to be used in place of the letter S in the graffiti).

"The officer contacted the temple and documented the hate-graffiti, and police are conducting additional patrols in the area," the police department said.

Upon seeing the graffiti for himself, Rabbi Daniel Weiner told BuzzFeed News he felt "a sense of horror and anger and frustration, but by the same token a bit of disappointed expectation in the sense that we weren't surprised with everything going on in the country."

The US Jewish community has been alarmed by more than 100 threats made against them in 2017.

On Tuesday, Jewish centers and schools in at least nine states and the District of Columbia received confirmed bomb threats, forcing evacuations and closures — the sixth such time this year that Jewish facilities have been targeted.

A former disgraced journalist, Juan Thompson, was arrested and charged March 3 in connection with threats in eight states. Federal officials claim Thompson made the threats as a hoax to get revenge on an ex-girlfriend.

The Department of Homeland Security on Thursday condemned what Secretary John Kelly described as " an unacceptable and disturbing rise in the number of apparent hate-inspired attacks and harassment against individuals and communities."

"I strongly condemn any violent acts to perpetuate fear and intimidation not only against individuals, but entire communities," Kelly said in a statement that did not explicitly mention the Jewish community. "I pledge the full support of the Department of Homeland Security to assist local, state, and federal investigations into these incidents."

Rabbi Weiner, who has worked at the Temple for 16 years, says this is the most anti-Semitic act he has witnessed.

"To see it up close and personal at a place you regard as sacred is devastating," he said.

Security at the Temple would be strengthened, he added, but noted that his congregants were defiant.

"People are angry, frustrated, hurt, troubled, concerned, but also there's a degree of defiance that those who wallow in this kind of domestic terrorism cannot succeed or change how we view our country," he said.